Adjustable desk lamp



FIG. 1 is a front elevational view of a adjustable desk lamp, showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side view thereof, the right side view being a mirror image;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side elevational view, to enlarged scale, showing the lamp arm in the extended position;

FIG. 6 is a front elevational view of the design in the extended position;

FIG. 7 is a bottom plan view of the design in the extended position. 

The ornamental design for a adjustable desk lamp, as shown and described. 